JP6155557B2 - Lid material - Google Patents

Description

  The present invention relates to a lid member for sealing an opening of a cup container.

  A cup container having an opening sealed with a sheet-like lid material is widely used as a container for packaging foods such as instant noodles, instant soups, and confectionery. Many of the lid materials for sealing the opening of such a cup container are formed of a laminated sheet including a resin layer or a metal foil. In addition, the shape of the lid material has been devised according to the purpose of use, and it has been proposed to give various functions by forming cuts and half-cut lines in the lid material. (For example, see Patent Documents 1 to 3).

JP 2009-73562 A JP 2010-89805 A Japanese Patent Application Laid-Open No. 2010-1003008

  The lid member made of the above-described laminated sheet is excellent in strength and function, but has a problem that the peripheral edge is not very good. When an operator or consumer who wraps food or the like touches the periphery of the lid, the lid feels uncomfortable and sometimes feels painful. In view of such a situation, depending on various conditions such as a contact angle and a contact speed with respect to the periphery of the lid member, it is impossible to deny the possibility that fingers and the like are cut by the lid member.

  Therefore, an object of the present invention is to provide a lid material that is excellent in various properties required for a lid material such as strength and that has a good touch at the peripheral edge.

The present invention is a lid member for sealing a cup container that is sealed by a flange of a cup container, and has an opening tab in which a part of the peripheral edge protrudes, and is outside the region sealed by the flange. Except for a predetermined range including at least the opening tab, the region is formed with a strength weakening line extending so as to surround the region sealed by the flange .

  According to the present invention, since the peripheral portion is bent along the strength weakening line formed on the cover member, the cover member contacts the fingers with the surface, so that the peripheral edge bites in and the pain is caused. Can be reduced.

A perspective view and a sectional view of a packaging container using a lid according to the first embodiment The expanded sectional view of the packaging container using the lid which concerns on 1st Embodiment The top view of the cover material concerning a 1st embodiment The expanded sectional view of the packaging container using the cover material concerning a 2nd embodiment The top view of the cover material concerning a 2nd embodiment The top view of the cover material concerning Example 1. The figure which shows the layer structure of the cover material which concerns on Example 1, and the expanded sectional view of the packaging container using a cover material The top view of the cover material concerning Example 2. The figure which shows the layer structure of the cover material which concerns on Example 2, and the expanded sectional view of the packaging container using a cover material

(First embodiment)
FIG. 1A is a perspective view of a packaging container 100 using the lid 1 according to the present embodiment. FIG. 1B schematically shows a cross-sectional view of the packaging container 100 taken along line AA ′ of FIG.

  The packaging container 100 is used for packaging various contents such as instant foods such as instant noodles, confectionery, dairy products, and the like, and is sealed by a cup container 50 and a flange 51 of the cup container 50. It is comprised from the cover material 1 which seals the opening part of the container 50. FIG. An opening tab 10 is provided on a part of the peripheral edge of the lid member 1 for gripping when the lid member 1 is peeled from the cup container 50.

  2A to 2D schematically show enlarged sectional views of the peripheral portion of the flange 51 circled in FIG. 1B. The lid member 1 is composed of, for example, a lower layer 2 that is a seal layer and an upper layer 3 laminated on the lower layer 2. The upper layer 3 is a single layer or a laminate including, for example, paper, aluminum foil, plastic, and the like. The lid member 1 has a strength weakening line 4 formed outside the region sealed by the flange 51.

  The strength weakening line 4 is, for example, a half cut. The half cut may be formed on the front surface side which is the outer side of the packaging container 100 of the upper layer 3 as shown in FIG. 2 (a), and the opposite back side as shown in FIG. 2 (b). May be formed. Further, as shown in FIG. 2C, it may be formed through the lower layer 2 and part of the upper layer 3. Alternatively, the half cut may be formed through the upper layer 3 and part of the lower layer 2. Thus, the position and depth which form a half cut are not specifically limited.

  The intensity weakening line 4 is alternatively a perforation, for example. As shown in FIG. 2D, the perforation is formed, for example, by cutting through the lid 1. Or even if it is not a perforation, it should just be a partial penetration cut provided with a suitable seam so that the peripheral edge of lid 1 may not fall off.

  FIG. 3 shows a plan view of the lid 1. FIG. 3 shows an example of a position where the intensity weakening line 4 is formed. In this example, the strength weakening line 4 is formed over the periphery excluding the vicinity of the opening tab 10 of the lid member 1. The strength weakening line 4 may be formed over the entire periphery of the periphery of the lid member 1 or may be formed over a part of the periphery.

  Moreover, in the example shown in FIG. 3, the edge part of the strength weakening line 4 is connected to the periphery of the lid | cover material 1, and the part except an edge part is formed in parallel with a periphery. However, the end of the strength weakening line 4 may not be connected to the periphery of the lid member 1. Further, part or all of the strength weakening line 4 may not be parallel to the periphery. A plurality of intensity weakening lines 4 may be formed. It is preferable that the strength weakening line 4 is formed outside the sealing portion between the lid member 1 and the flange 51 and in a range of a distance of 0.5 mm to 5 mm from the periphery of the lid member 1. In particular, it is preferable that the distance from the periphery of the lid member 1 is 1 mm to 3 mm.

  As described above, in the lid material 1, the strength weakening line 4 is provided outside the sealing portion between the lid material 1 and the flange 51, so that the strength can be increased even before the lid material 1 is peeled off from the cup container 50 and opened. The lid member 1 can be bent along the weakening line 4. Therefore, before and after the lid material 1 is peeled off from the cup container 50 and opened, when the operator or consumer touches the peripheral edge of the lid material, the peripheral edge of the lid material 1 is included along the strength weakening line 4. The area bends. Thereby, since the lid | cover material 1 contacts a finger | toe with a surface, the possibility that the discomfort and the pain that a peripheral edge bites may be reduced can be reduced. Further, it is possible to reduce the risk of fingers being cut by the lid material regardless of various conditions such as the contact angle and contact speed of the finger with respect to the periphery of the lid material 1.

  In a state where the lid member 1 is sealed by the flange 51 of the cup container 50, the lid member 1 is bent along the strength weakening line 4 in advance by the region including the peripheral edge of the lid member 1 being along the warp of the flange 51. It may be. Even in this case, since the area in the vicinity of the periphery of the lid member 1 comes into contact with the finger on the surface, the same effect as described above can be obtained.

  The outer shape of the lid member 1 is not particularly limited, and can be appropriately selected according to the shape of the opening of the cup container 50. Examples of the outer shape of the lid member 1 include a substantially circular shape shown in FIG. 3 and a polygonal shape such as a substantially elliptical shape and a rectangular shape. Further, the size of the lid member 1 is such that the opening and the lid member are sealed as long as a width capable of forming the strength weakening line 4 at least partially outside the region sealed by the flange 51 of the cup container 50 can be secured. Can be selected as appropriate in consideration of properties and appearance.

(Second Embodiment)
Since the plan view of the lid according to the present embodiment and the perspective view of the packaging container are the same as those of the first embodiment, the illustration is omitted. The same reference numerals are assigned to the same components. 4 (a) to 4 (d) schematically show enlarged sectional views of the peripheral portion of the flange 51 circled in FIG. 1 (b). FIG. 5 shows a plan view of the lid 1. The lid member 1 has a weak adhesive layer 5 having a lower adhesive strength than other regions in an area including at least a part of a portion where the strength weakening line 4 is formed. It differs from the first embodiment in that it is formed through the adhesive layer 5. FIG. 5 shows the weak adhesive layer 5 transparently.

  As shown in FIG. 4 (a), as the strength weakening line 4, a half cut may be formed on the outer surface of the packaging container 100 of the upper layer 3, and as shown in FIG. It may be formed on the opposite surface. In these cases, the weak adhesive layer 5 is provided on the inner layer portion of the upper layer 3. Further, as shown in FIG. 2C, it may be formed through the lower layer 2 and part of the upper layer 3. In this case, the weak adhesive layer 5 is provided between the upper layer 3 and the lower layer 2. The half cut may be formed through the upper layer 3 and part of the lower layer 2. Thus, the position and depth which form a half cut are not specifically limited. Further, as shown in FIG. 4D, intermittent penetration cuts such as perforations may be formed as the strength weakening lines 4. In this case, the weak adhesive layer 5 is provided between the inner layer portion of the upper layer 3 or between the upper layer 3 and the lower layer 2. The weak adhesive layer 5 is preferably provided in one or more layers in a region having a width of 1 mm or more including a place where these cuts are formed. Moreover, the weak adhesive layer 5 does not need to be provided in all the places where a cut is formed. The weak adhesive layer 5 is made of, for example, a peeling varnish, and the adhesive strength is preferably 0.1 to 2.0 N / 15 mm. Or you may provide the non-bonding part which does not bond instead of providing the weak adhesive layer 5. FIG.

  When a cut is formed by providing the weak adhesive layer 5 or the non-adhered portion, when the cutting blade enters the weak adhesive layer 5 or the non-adhered portion from the cut side surface, the layer into which the cutting blade has entered is another layer. It becomes easy to lift in the direction away from, and it becomes difficult to prevent the cutting blade from entering. Therefore, it is easy to form a half cut or a through cut, and it is possible to improve the processing accuracy and reduce the processing cost.

  Also in this embodiment, when an operator or a consumer touches the periphery of the lid member, the region including the periphery of the lid member 1 is bent along the strength weakening line 4, and the lid member 1 comes into contact with the fingers on the surface. Therefore, it is possible to reduce the possibility of causing a sense of incongruity and pain that the peripheral edge bites into, and to reduce the risk of injuring fingers and the like with the lid material.

  FIG. 6 shows a plan view of the lid member 1 according to the present embodiment, and FIG. 7A schematically shows a cross-section of the lid member 1 shown by the line BB ′ in FIG. 1 shows a layer structure. FIG. 7B schematically shows a cross-sectional view of the vicinity of the peripheral edge of the packaging container using the lid 1 according to the present embodiment.

  The lid member 1 is suitable for packaging contents such as instant fried noodles that require work such as once hot water is put into the cup container 50 and hot water refrigeration cooking is performed. A partial peeling portion 11 is provided on a part of the lid material 1. As shown in FIG. 6, the partial peeling portion 11 divides a separation tab 12 located in a portion facing the opening tab 10 in a peripheral portion of the lid member 1 and a partial region connected to the peeling tab 12. A half cut 13 formed in the upper layer 3 of the lid member 1 and a half cut 14 formed in the lower layer 2 of the lid member 1 so as to partition the peeling tab 12 from other parts. It is formed by making only the upper layer 3 peelable. A plurality of annular half cuts 15 are formed in the lower layer 2 of the partial peeling portion 11.

  The upper layer 3 of the lid 1 is composed of layers of PET (polyethylene terephthalate) / ink / paper in order from the outer side of the packaging container 100. Further, the lower layer 2 of the lid 1 is composed of each layer of extruded PE (polyethylene) / PET / aluminum foil / adhesive resin from the side where the upper layer 3 is laminated.

  A peeling varnish is laminated between the upper layer 3 and the lower layer 2 of the partial peeling portion 11 of the lid 1 except for a region surrounded by the annular half cut 15. As a result, when the peeling tab 12 is pinched and the upper layer 3 of the partial peeling portion 11 is peeled off from the lid member 1, the lower layer 2 in the region surrounded by the annular half-cut 15 is removed along with the upper layer 3. A plurality of holes for cutting appear.

  The diameter of the lid 1 was 180 mm, the partial peeling portion 11 was a substantially pentagonal region, and 21 annular half-cuts 15 having a diameter of 6 mm were formed. Further, as the strength weakening line 4, a half cut was formed in a part of the upper layer 3 and the lower layer 2 at a position of 1.5 mm from the periphery of the lid. However, the strength weakening line 4 was not formed in the partial peeling portion 11. Moreover, the opening tab 10 and the peeling tab 12 were 10 mm in length.

  The cup container 50 was a round shape having the same diameter as the lid member 1 and an outer diameter of 180 mm, and made of expanded polystyrene. The flange width of the flange 51 of the cup container 50 was 10 mm, and the maximum seal width with the lid 1 was 6 mm. Moreover, the edge width outside the sealing part of the cover material 1 was 2.5 mm. The strength weakening line 4 was formed at a position 1.5 mm from the periphery of the lid 1.

  FIG. 8 shows a plan view of the lid member 1 according to the present embodiment, and FIG. 9A schematically shows a cross-section of the lid member 1 shown by the line CC ′ in FIG. 1 shows a layer structure. FIG. 9B schematically shows a cross-sectional view of the vicinity of the periphery of the packaging container using the lid 1 according to the present embodiment.

  This example differs from Example 1 in that a peeling varnish is laminated as the weak adhesive layer 5 between the upper layer 3 and the lower layer 2 with a width of 3 mm centering on the strength weakening line 4. In FIG. 8, the weak adhesive layer 5 laminated | stacked on the location in which the strength weakening line 4 was formed is transparently shown.

  In order to evaluate the touch of the peripheral edge of the lid material according to Example 1 and Example 2, the touch evaluation was performed using Examples 1 and 2 and a comparative example in which the strength weakening line 4 was not formed in Example 1. went.

  The hand evaluation was performed by counting the number of times the operator felt pain in the fingers in the process of producing 1 million lids according to each of the examples and comparative examples. Table 1 shows the results.

  In the comparative example, pain was felt twice, but in Examples 1 and 2, neither pain was felt and a good touch evaluation was obtained. Further, in Example 2, by providing a weak adhesive layer at the place where the strength weakening line is formed, the rigidity in the vicinity of the strength weakening line is reduced as compared with Example 1, and the touch feeling with the fingers is softened. A better touch evaluation was obtained.

  Moreover, about Example 1 and 2, cut property evaluation was performed further. Cutability evaluation was prepared by preparing 100 packaging containers using the lid material according to each example, and intestine-filled sausage that was regarded as a finger in contact with the periphery of the lid material at a speed of 300 mm / min. After scanning the distance, it was done by checking the presence or absence of cuts. As a result, it was confirmed that no cut occurred.

  The lid material of the present invention can be widely used as a lid for sealing the opening of a cup container, and can be particularly suitably used as a lid for cup containers for packaging foods such as instant noodles and confectionery.

DESCRIPTION OF SYMBOLS 1 Cover material 2 Lower layer 3 Upper layer 4 Strength weakening line 5 Weak adhesion layer 13, 14, 15 Half cut 10 Opening tab 11 Partial peeling part 12 Peeling tab 50 Cup container 51 Flange 100 Packaging container

Claims (6)

A lid for sealing the cup container, sealed to the flange of the cup container,
It has an opening tab in which a part of the peripheral part protrudes,
A lid member in which a strength weakening line extending so as to surround a region sealed by the flange is formed in a region outside the region sealed by the flange, excluding a predetermined range including at least the opening tab. The lid material is
A lower layer which is a sealing layer;
An upper layer that is laminated to the lower layer and is a single layer or a laminate including at least one of paper, aluminum foil, and plastic,
The lid material according to claim 1, wherein the strength weakening line is formed in at least one of the lower layer and the upper layer. It said intensity line of weakness is a half-cut, the cover material according to claim 1 or 2. It said intensity line of weakness is a perforation, the lid material according to claim 1 or 2. The region including at least a part of the portion where the strength weakening line of the lid member is formed has a weak adhesive layer having a lower adhesive strength than other regions inside, or has an unbonded portion. The lid according to any one of claims 1 to 4 , wherein the strength weakening line is formed so as to penetrate the weak adhesive layer or the non-adhered portion. The strength weakened line is formed at a position of 1mm~3mm from the peripheral edge of the lid member, the lid member of any of claims 1-5.

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